Lathe chuck



0. STYLES LATHE CHUCK Oct. 30, 1934.

Filed Dec. 1932 2 Sheets-Sheet l Oct. '30, 1934. I o. STYLES 1,978,611

LATHE CHUCK Filed Dec. 29. 1952 2 Sheets-Sheet 2 Patented Oct. 30,

UNITED STATES PATENT- OFFICE LATHE CHUCK Oliver Styles, Santiago; Chile i AppIicationDecember29, 1932, Serial No. 649,259

7 Claims. (01. 279-106) invention mate to improvements in step pulleys 4. At one end" the mandrel {lore-- lathe chucks. duced andthreaded at and a diametrically an "The main object of the invention is to'provide larged head. 6 is threaded thereon, thisend of thea lathe chuck so constructed 'as to permit the device as a whole being hereinafter referred to :5 insertionand removal ofwork witl'iout stopping as the forward end for convenience in descrip- 60 orreversing the lathe, thus greatly increasing the tion. At its rear end the mandrel is threaded at speed of production and facilitating the work on 7 and a nut 8 is threaded thereon, the forwardly the lathe. disposed face 9 of this nut being beveled or an- I Another objectis to provide a lathe chuck of gularly cut as shown and for a purpose to be set 10 exceedingly simple, durable and efficient conforth.

structionand embodying an outer constantly ro- A sliding sleeve 10 is slidably mounted in the tating mandrel, an inner sleeve and a slide rod, bore 11 of the mandrel 1 to rotate therewith and chuck'jaws connected to the slide rod and'oper extends substantially from end to end thereof, able to'press together on the work or release the the forwardly disposed end of the sleeve being same by an axial movement of the slide rod and threaded at l2"to receive the rear tubular end 13 controlling and operating mechanism for releasof the clutch jaw clamping collet 14. Adjacent ing the chuck fromthe rotating mandrel during the end of the mandrel 1 this collet 14 is flared the insertion or removal of work. outwardly at 15 and extended for some distance Another object is toprovide a chuck of this to terminate in an angular shoulder or rim 16 20 character including an operating mechanism adapted to coact witha clamping ring 17 threa'dwhichmay be conveniently and safely operated ed at 18 in the end of the mandrel head 6 and with one hand thus leaving the operator's other having its inner periphery complementarily bevhand free to handle the work. eled as at 19. The collet 14 is split at diametri- With these and other objects and advantages cally opposite points at 20 from its flared portion 25 in-view the invention resides in the novel con- 15 outward to its forward end. It will be evident 302 s'truction and arrangement of parts-as hereinafter that by this construction a forward a'xialmove set forth'and claimed reference being had tothe ment of the sleevelO will through the coactlon accompanying drawings wherein a preferred emof the collet shoulder 16 and ring 17 constrict bodiment of the invention is illustrated for exemthe collet and a reverse movement will allow the 39-:p1ification and wherein: collet to expand through its inherent resiliency. 5 Figure 1 is a longitudinal section through the The collet is of course made of spring material chuck showing the jaws opened for the insertion for this purpose. ofthe work. j v A slide rod or spindle 21 is slidably and rotat- Figure 2 is a view similanto Figure 1 but showably mounted in the bore 22 of the sleeve 10, the s5; in? t e jaws clos an S w the operating saidrod being preferably, though not necessarily leversremoved. of somewhat smajllerdiameter than this bore 22 Figure 3 'wsection 21 8 he i e 33 and being held in alignment therewith by a dia- Figure l. i metrically enlarged portion 23. At itsfront end ure 4 is' an end view of thework receiving the slide rod 21 is providedwith a nut 24 and end of'the chuck. v i washer 25 and spaced inwardly therefrom a rigid Fi ure 5 is a d a d m tal vati f and preferably integrallyiormed collar or-shoulthe chuck jaw clamp collet. der 26. Lock lugs 27 areprovided on the-"front "F e 6 is an fl d' detached real face of this collar 26 at diametrically opposite inner end view of'th chuck jaw ca r points. The chuck jaw carrier 28 comprises a 45 5 Figu e 7 is a Sec on al 7-' in tubular neck '29 and an outwardly flared por- Figure 1. r tion or mouth 30, the said neck being rotatably ure 8 S'a S n al the l e 8--8 1 and slidably mounted on the slide rod21bet'ween Figure 2. 1 the washer 25 and collar 26 and being of such Figure 9is a view similar to Figure 8 but showlength as to play freely and axially on the slide 50 ing an alternative form of construction. rod between these elements. Notches '31 are out Referring now more particularly to the drawat diametrically opposite points in the rear aningsthereference numerall designates the tunular faceof the neck 29 to receive the said lock bular lathe mandrel journaled at 2 in the usual lugs 27 on the collar 26. In practice the slide bearings 3 and rotated in conventional manner rod 21 is held rigidly against rotation with the by a belt (notshown) running over the cone ormandrel 1 and sleeve 10 and hence when this head 42 on the key40.

ner of the latch plate 54 and extends through. the aperture 49 in the bearing 3 andis connected rod is moved forwardly in the sleeve the lock lugs 27 will enter the notches 31 and hold the chuck carrier 28 against rotation allowing work to be removed from or inserted in the chuck which of course is in its opened position at this time.

A pair of spaced parallel ears 32 are extended forwardly from the carrier 28 at each side of the bore. through the neck 29. thereof and these ears are-provided adjacent their outer or forward ends with apertures 33. The chuck jaws 34 of which two are employed comprise the arcuate shells 35 and the outer work gripping elements; 36, the said jaws being hinged at their inner ends to the jaw carrier 28 by pins passed through thei When in their closed apertures 33 in the ears 32. I position the jaws fit within the outer shoulders 16 of the collet 14 and hencewill bepressed tightly together on the work when the collet is.

a groove 41 in its upper face adjacent its forward end forming a head 42 as shown. A sliding sleeve 43 is slidably mounted on the shaft 37 and: carries an upwardly extended yoke 44 and is slotted rearwardly thereof as at 45 to receive the said Beneath the yoke 44 and diametrically opposite therefrom spaced bearing ears 46 are depended from the sleeve 43 and an operating'rod 47 is hinged bya pin 48between these ears and extendedv forwardly therefrom :through an aperture 49 in the rear bearing 3. At

its forward. end. the rod 4'? is-pivoted at 50 to an operating lever-5l which is pivotally attached at 52 to a bracket 53 carried by the bearingB. A

triangular latch plate 54 is pivoted by, its up; x per-corner at.55 to the sleeve 43 and. at its rearwardly disposed corner bears a laterally extendedlatch key 56 which is adapted normallyto lie in the groove 41- in the key 40 between therear end of this groove and the'rear end of the sleeve A link 57 ispivotedat 58 to the lower corat its forward end to an auxiliary lever 59: fulcrumed at 60 on the mainoperating lever'51, By

this construction it 111 be apparent that a, movement of the free end of the operatinglever 51 to the left or rearwardly will slide the sleeve 43' and the key 40 rearwardl y along theshaft 37.

Aconnecting block 61 is-provided andhas at its lower end a hub 62 with a bore 6.3adapted to fitv over the shaft 3'7 and having in its. upper margin a recess 64 in which is mounted a pawlplate 65 toothed to engage thetoothed upper margin 66 of the key40 adjacent the rear; end thereof. Theplate 65 is pressed into engagement with the key. 40 by aset screw 67', and. ofcourse the block 61 may be adjusted axiallyalong the shaft 37 by loosening this screw. Atits upper end the block 611 has ahub 68 with,abore .69 to receive the rearwardly extended end of the the slide rod 21 and will pull the same-rearwardly throushthe slee e 0.p lli h ocle uea tout;

crumed as shown at 80.

of the notches 31 and freeing the chuck jaw carrier 28 from the rod 21.

A cam collar 71 is slidably mounted on the rear end portion of the mandrel 1 and has a peripheral groove 1'72 to receive the forks '73 of the yoke 44 and is beveled or tapered at its rear end as shown at '74. A band 75 is slidably mounted on the mandrel some distance rearwardly of the cam ol ar e rl s. r id y conne ted t the s id sleeve 10 by a screw '76 passing inwardly through the band and threaded in the said sleeve. A longitudinal sliding play of the band 75 and the sleeve 10 is permitted by a longitudinal slot 77 in the mandrel 1 through which the screw '76 passes The band '75 is provided with equispaced slots '78 inwhich operating fingers '79 are ful- At their rear ends the fingers 79; are angularly cut at 81 to coact with the angular face 9 of the nut 8 aforesaid. A modification of the connecting block 61 is shown in Figure 9 in which it.is provided at its upper. end with a split clamp to receive a split bearing 82 which, slips over. the slide rod 21 and which is clamped in place by a, set .screw 83.

Inoperation and with the chuck jaws 34 pushed outward and opened the ork is inserted between. the jaws, and the main, operating lever is moved to the left pulling the slide rod 21 rearwardly and drawing the chuck jaw carrier 28 inward, and

closing the chuck jaws. on the work, the carrier being at the same. time released by the disengagement of thelock lugs2'7 from the notches 31 as aforesaid. The jaw carrier 28 and the jaws 34- are thus free to rotate with the mandrel 1. The

auxiliary lever 59 is then swung to. the right by j filis then swungfurther to the-left. sliding the cam collar 71 along, the mandrel and forcing. its beveled rear end 7.4. under the ends of the fingers 79 and swinging their oppositeangular ends 81 inward. against the angular face 9 0i the nut- 8.

The band75 is thus'forced forwardly and carries the sliding sleeve 10 along forcing the shoulder 16 of the collet 14 into the clamping ring 17 and clampingv the said collet. on the jaws 34 and the work therein. The-work is thus firmly held in place during the required time. jaws totheir opened position the procedure outlined is simply reversed as will be readilyunderstood. The collet 14 must have sufficient resiliency or elasticity and the angle of the engaging faces of thiscolletandfthe clamping ring 17. must be great enough to allow the collet toirelease the jack carrier 28 the-instant. pressure is removed. This elasticity may be supplemented by additional nd; se arat pri if. ne sa y. h e

To, return the tion may also be reversed and the collet caused to p rip he jaws pon, an inwardmovement inst a of the outward movement; herein outlined; if. so.

desired, only minor; changes considered within the scope of'the presentinventionibeing necessary;

to; accomplish this reversing. As the jaws '34 emerge from the body of the chuck they will pos-.

Further modificationsandadvantages will. be,

apparent .to those skilled in .the art.

While I have herein set forth a certain preferred embodiment of my invention it is understood that I may vary from the same in minor structural details so as best to construct a practical device for the purposes intended, not departing from the spirit of the invention and within the scope of the appended claims.

I claim:

1. In a chuck, a mandrel, a clamping ring therein, a spring collet slidably mounted in the mandrel, a slide rod slidably mounted in the mandrel, and chuck jaws connected to the slide rod and adapted to be gripped by the collet.

2. In a chuck, a mandrel, a clamping ring therein, a spring collet slidably mounted in the mandrel, a slide rod slidably mounted in the mandrel, and chuck jaws connected to the slide rod and adapted to be gripped by the collet, and means for independently operating the said collet and slide rod to clamp the clutch jaws or release them and force them outwardly.

3. In a chuck, a rotating mandrel, a sleeve slidably mounted in the mandrel to rotate there- 'with, a spring collet connected to the sleeve, a

slide rod slidably mounted through the sleeve, a chuck jaw carrier, chuck jaws hinged to the carrier, and means for rotatably connecting the said jaw carrier and slide rod, and means for locking the jaw carrier against rotation.

4. In a chuck, a rotating mandrel, a clamping ring therein, a sleeve slidably mounted in the mandrel to rotate therewith, a spring collet connected to the said sleeve and adapted to be pressed into constricting engagement with the said clamping ring by sliding the said sleeve, a slide rod slidably mounted through the said sleeve and locked against rotation therein, a chuck jaw carrier rotatably mounted on the slide rod chuck jaws hinged to the said carrier, and means for rigidly connecting the said slide rod and carrier to lock the carrier against rotation.

5. In a chuck, a rotating mandrel, a clamping ring therein, a sleeve slidably mounted in the mandrel to rotate therewith, a spring collet connected to the said sleeve and adapted to be pressed into constricting engagement with the said clamping ring by sliding the said sleeve, a slide rod slidably mounted through the said sleeve and locked against rotation therein, a chuck jaw carrier rotatably mounted on the slide rod, chuck jaws hinged to the said carrier, and means for rigidly connecting the said slide rod and carrier to lock the carrier against rotation, and operating means for independently or simultaneously sliding the said sleeve and slide rod lengthwise to clamp the collet on the chuck jaws or release the collet and force the jaws out- Ward.

6. In a chuck, a mandrel, a head on the mandrel, a sleeve slidably mounted therein, a slide rod slidably mounted in the sleeve, a spring collet secured to the sleeve within the mandrel head, chuck jaws attached to the slide rod within the collet, the said collet and jaws being operable by reciprocating movement of the said sleeve and slide rod, a shaft slidably supported adjacent the mandrel, a key slidably mounted in the shaft, a connecting block connecting the key and slide rod, a sleeve slidably mounted on the shaft, a cam collar slidably mounted on the mandrel, a yoke connecting the said sleeve on the shaft and the cam collar, a band slidably mounted on the mandrel and secured to the said sleeve in the mandrel, arms fulcrumed on the said band, a nut secured on the mandrel and adapted to be engaged by the said arms to slide the band and sleeve forwardly, and operating means for sliding the said key and sleeve on the shaft to reciprocate the said slide rod and sleeve in the mandrel.

7. In a chuck, a mandrel, a sleeve slidably mounted therein, a slide rod slidably mounted in the sleeve, a spring collet secured to the sleeve Within the mandrel, chuck jaws secured to the slide rod within the collet, the said collet and clutch jaws being operable by reciprocating movement of the said sleeve and slide rod, a shaftslidably supported adjacent the mandrel, a key slidably mounted in the shaft, a connecting block connecting the key and slide rod, a sleeve slidably mounted on the shaft, a cam collar slidably mounted on the mandrel, a yoke connecting the said sleeve on the shaft and the cam collar, a band slidably mounted on the mandrel and secured to the said sleeve in the mandrel, arms fulcrumed on the said band, a nut secured on the mandrel and adapted to be engaged by the said arms to slide the band and sleeve forwardly, and operating means for sliding the said key and sleeve on the shaft to reciprocate the said slide rod and sleeve in the mandrel, and latch means whereby the said key is released from the operating means after a certain travel.

OLIVER STYLES. 

